Feature spec
Goal: Send a clear invoice after finishing a job.
- Add a client, line items, a due date, and payment instructions.
- Preview the total before exporting a PDF.
- Keep an editable draft if export fails.
App Overview
ESPN: Live Sports & Scores
All of ESPN
Free · In-app purchases
OVERALL US RANK
#75
Grossing · all categories
REVENUE (Est)
$229K/mo
$127K - $331K
RATING
★ 4.6
4,154,252 ratings · Top 15%
Evidence scope: #75 is the current overall US Grossing chart position. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included15 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Screen plan
Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.
States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.
Differentiate and validate
Hypothesis: Contractors need faster repeat invoices more than more templates.
First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.
The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.
Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.
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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for ESPN: Live Sports & Scores: map the core Sports workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
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Opportunities
AI-GENERATED OPPORTUNITY HYPOTHESES
These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.
Hypothesis 1
Offer an ad-free premium subscription tier.
Assumption to check: Users find the ads intrusive and distracting.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a reliable real-time data feed.
Assumption to check: Live updates can sometimes lag or be inaccurate.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance the navigation flow with clearer labels and transitions.
Assumption to check: Navigation between sections can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize their favorite teams and notifications.
Assumption to check: Limited customization options for user preferences.
Validate with people who use this workflow before building.
App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
App Store description
All of ESPN. All in One Place. Introducing our brand-new streaming offering that gives you everything ESPN has to offer in one place. Get ESPN, ESPN2, ESPNU, SECN, ACCN, ESPNEWS, ESPN+, ESPN Deportes, and ESPN on ABC content. Stream thousands of live events, studio shows, sports documentaries, and on-demand content from the ESPN networks. Get real-time scores, breaking news, expert analysis — all in one place. What You Can Watch on ESPN NFL (Monday Night Football) | NBA | MLB | NHL | College Sports | Golf | Soccer | Tennis (Grand Slams) | Sports Documentaries (30 for 30s, ESPN Originals, E60s) | Shows (SportsCenter, GetUp, First Take, College Gameday & more) Game-Changing Features New Ways to Explore – Discover personalized content, top games, and trending highlights faster than ever. SC For You – A SportsCenter with personalized highlights for you in the ESPN App. Every single day. Streamcenter – Watch live games on your TV and engage in real time with your phone. Stay Connected to the Action Fast scores, real-time updates, and breaking news for your favorite teams and leagues. Listen live to ESPN Radio & your favorite ESPN Podcasts. Stream ESPN, ESPN2, ESPNU, SECN, ACCN, and more. Some content availability may vary by region. For specific questions, please visit the ESPN FAQ at support.espn.com. See which plan is right for you! Download the ESPN App now and experience the future of sports streaming with ESPN! Certain content requires a paid subscription. ESPN Select includes ESPN+ only; ESPN Unlimited includes all ESPN networks and services, including ESPN+. Content subject to change. For personal and non-commercial use only. Blackouts and other terms & restrictions apply. Terms of Use - https://disneytermsofuse.com/ Privacy Policy - http://www.disneyprivacycenter.com Your California Privacy Rights - https://privacy.thewaltdisneycompany.com/en/current-privacy-policy/your-california-privacy-rights/ Do Not Sell My Information - https://privacy.thewaltdisneycompany.com/en/dnsmi Before you download this app, please consider that it includes advertising, some of which may be targeted to your interests., . Please note: This app features Nielsen's proprietary measurement software which will allow you to contribute to market research, like Nielsen's TV Ratings. Please see www.nielsen.com/digitalprivacy for more information. You may also visit Settings in the app to opt out of Nielsen measurement.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
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Build scope
Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Define the first version
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Set boundaries
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Check the hard parts
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
SUGGESTED BUILD STACK
React Native
Expo
Supabase
Axios
React Navigation
TypeScript
BUILD KIT DIFFICULTY
Intermediate
From the Build Kit assessment.
A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.
